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A critical review of symbiosis approaches in the context of Industry 4.0
Martina Scafà,Marco Marconi,Michele Germani 한국CDE학회 2020 Journal of computational design and engineering Vol.7 No.3
The implementation of symbiosis approaches is recognized as an effective industrial strategy towards the optimization of resource exploitation and the improvement of collaboration in the context of Industry 4.0. An industrial system can be considered as a complex environment in which material, energy, machine, and human resources should cooperate towards the improvement of efficiency and the creation of value. According to this vision, the paper presents a detailed literature review about the existing symbiosis approaches: (i) industrial symbiosis models, which mainly aim at the sharing of resources among different companies, and (ii) human symbiosis, which focuses on how to effectively strengthen the synergy among humans and machines. Strengths, weaknesses and correlations among the most common symbiosis approaches are analysed and classified. Finally, the existing symbiosis models are related with the pillars of the Industry 4.0 paradigm, in order to understand what should be the future directions of research in the context of collaborative manufacturing.
Intercultural Art Education: Towards Understanding Local, Glocal and Global Cultural Differences
Martina Paatela-Nieminen,박윤소 한국국제미술교육학회 2009 미술과 교육 Vol.10 No.2
In this paper I discuss learning through the intertextual method to understand its implications for art education. Intertextuality refers to the way every text absorbs and transforms other texts. I understand the term text to mean visual, verbal and other communicative forms of culture. Texts are shaped by immanent time and by divergent temporalities of history and they are in continuous flux. The model has been taken from linguistics, in particular the ideas about intertextuality of Gérard Genette and Julia Kristeva. I applied the form of a multimedia that simulates the open-ended intertextual and intermedial method in the area of children’s picturebooks. One can study the differences between the visual and verbal texts open-endedly in relation to the text itself, the discourse of children’s picturebooks, and more widely to culture. Also, I have applied the intertextual method in practice in the field of art education (museum pedagogy, school arts, art education and class teacher university students and artists) and in special areas (arts, media, picturebooks and Japanese popular art) and in different cultures (Europe, USA, Africa, Japan). I employ intertextuality in order to discover intercultural differences so as to understand the plural meanings of our local and global issues, as I believe that art teachers should teach art with a broad perspective in relation to culture.
Martina Gerlane de Oliveira Pinto,Saulo Leonardo Sousa Melo,Yuri Wanderley Cavalcanti,Elisa Diniz de Lima,Patrícia Meira Bento,Daniela Pita de Melo 대한영상치의학회 2020 Imaging Science in Dentistry Vol.50 No.2
Purpose: This study aimed to quantify the influence of tooth position within the field-of-view (FOV) on cone-beam computed tomography (CBCT) imaging artifacts’ intensity when assessing teeth restored with various intracanal materials. Materials and Methods: Seventy single-rooted teeth were divided into 7 groups (10 teeth per group): NiCr post (NC), AgPd post (AP), metal core fiberglass post (MCFG), fiberglass post (FG), anatomical fiberglass post (AFG), fiberglass post cemented with core build-up cement (FGCo), and anatomical fiberglass post cemented with core build-up cement (AFGCo). All posts were cemented using a regular dual-curing resin cement (Allcem), except FGCo and AFGCo which were cemented with a core build-up dual-curing resin cement (AllcemCore). Each tooth was scanned on a CS9000 in 5 positions within the FOV: a central position, anterior horizontal peripheral, peripheral superior, peripheral inferior, and posterior horizontal peripheral position. Hyperdense, hypodense, remaining teeth areas and ROI areas were quantitatively analyzed using ImageJ software. Results: Posterior horizontal peripheral position increased the intensity of artifacts on FGCo and AFGCo post groups (P<0.05), and specifically the hypodense artifact intensity on FG and AFG post groups (P<0.05). NC and AP groups presented greater intensity of artifacts than any other post groups (P<0.05). Conclusion: Artifact intensity increases in the presence of high atomic number materials and when the object is not centered within the FOV. The impact of positioning within the FOV on artifact was greater for fiberglass posts cemented with core build-up dual-curing cement than for metal posts and fiberglass posts cemented with regular dual-curing cement.
Martina Todesco,Carlo Zardin,Laura Iop,Tiziana Palmosi,Pietro Capaldo,Filippo Romanato,Gino Gerosa,Andrea Bagno 한국생체재료학회 2021 생체재료학회지 Vol.25 No.3
Background: Due to the shortage of organs’ donors that limits biological heart transplantations, mechanical circulatory supports can be implanted in case of refractory end-stage heart failure to replace partially (Ventricular Assist Device, VAD) or completely (Total Artificial Heart, TAH) the cardiac function. The hemocompatibility of mechanical circulatory supports is a fundamental issue that has not yet been fully matched; it mostly depends on the nature of blood-contacting surfaces. Methods: In order to obtain hemocompatible materials, a pool of hybrid membranes was fabricated by coupling a synthetic polymer (polycarbonate urethane, commercially available in two formulations) with a decellularized biological tissue (porcine pericardium). To test their potential suitability as candidate materials for realizing the blood-contacting surfaces of a novel artificial heart, hybrid membranes have been preliminarily characterized in terms of physicochemical, structural and mechanical properties. Results: Our results ascertained that the hybrid membranes are properly stratified, thus allowing to expose their biological side to blood and their polymeric surface to the actuation system of the intended device. From the biomechanical point of view, the hybrid membranes can withstand deformations up to more than 70 % and stresses up to around 8 MPa. Conclusions: The hybrid membranes are suitable for the construction of the ventricular chambers of innovative mechanical circulatory support devices.